a modern QuakeWorld client focused on competitive online play

First-person shooter game

Source port for Build engine games

Free agile arena shooter

Tank digging battle game

FPS aim trainer

Game engine for Classic Doom

A Zandronum 3.0 fork with improved netcode, configurable movement and many small tweaks

Aliens vs Humans, First Person Shooter game with elements of Real Time Strategy

ReC98 source port of the first Seihou Project game

Epic story-driven FPS running on the Build Engine

Open source first person shooter

The Free and Fast Arena Shooter

A Quake mod based on the retro shooter SPRAWL

EDuke32 is an awesome, free homebrew game engine

A modern cross‑platform port of “STAR WARS™: Dark Forces” with mod support

Shoot and survive

Yamagi Quake II is an alternative client for id Software's Quake II

Leading the way in newschool multiplayer Doom online

First-person shooter with cooperative in-game map editing

Free fast paced arena shooter

Open source first person shooter

Top-down shooter action RPG

Modern cross-platform port of the Descent engine

Game engine for Return to Castle Wolfenstein

A modernization effort of DOOM-3-BFG

Fast paced, first person strategy game

Classic arena first person shooter

Dhewm 3 is a Doom 3 GPL source port

Open Source voxel shooter